{"id":53456,"date":"2025-11-25T08:16:31","date_gmt":"2025-11-25T08:16:31","guid":{"rendered":"https:\/\/youzum.net\/how-to-build-a-neuro-symbolic-hybrid-agent-that-combines-logical-planning-with-neural-perception-for-robust-autonomous-decision-making\/"},"modified":"2025-11-25T08:16:31","modified_gmt":"2025-11-25T08:16:31","slug":"how-to-build-a-neuro-symbolic-hybrid-agent-that-combines-logical-planning-with-neural-perception-for-robust-autonomous-decision-making","status":"publish","type":"post","link":"https:\/\/youzum.net\/de\/how-to-build-a-neuro-symbolic-hybrid-agent-that-combines-logical-planning-with-neural-perception-for-robust-autonomous-decision-making\/","title":{"rendered":"How to Build a Neuro-Symbolic Hybrid Agent that Combines Logical Planning with Neural Perception for Robust Autonomous Decision-Making"},"content":{"rendered":"<p>In this tutorial, we demonstrate how to combine the strengths of symbolic reasoning with neural learning to build a powerful hybrid agent. We focus on creating a neuro-symbolic architecture that uses classical planning for structure, rules, and goal-directed behavior, while neural networks handle perception and action refinement. As we walk through the code, we see how both layers interact in real time, allowing us to navigate an environment, overcome uncertainty, and adapt intelligently. At last, we understand how neuro-symbolic systems bring interpretability, robustness, and flexibility together in a single agentic framework. Check out the\u00a0<strong><a href=\"https:\/\/github.com\/Marktechpost\/AI-Tutorial-Codes-Included\/blob\/main\/AI%20Agents%20Codes\/neuro_symbolic_hybrid_agent_Marktechpost.ipynb\" target=\"_blank\" rel=\"noreferrer noopener\">FULL CODES here<\/a><\/strong>.<\/p>\n<div class=\"dm-code-snippet dark dm-normal-version default no-background-mobile\">\n<div class=\"control-language\">\n<div class=\"dm-buttons\">\n<div class=\"dm-buttons-left\">\n<div class=\"dm-button-snippet red-button\"><\/div>\n<div class=\"dm-button-snippet orange-button\"><\/div>\n<div class=\"dm-button-snippet green-button\"><\/div>\n<\/div>\n<div class=\"dm-buttons-right\"><a><span class=\"dm-copy-text\">Copy Code<\/span><span class=\"dm-copy-confirmed\">Copied<\/span><span class=\"dm-error-message\">Use a different Browser<\/span><\/a><\/div>\n<\/div>\n<pre class=\"no-line-numbers\"><code class=\"no-wrap language-php\">import numpy as np\nimport matplotlib.pyplot as plt\nfrom dataclasses import dataclass, field\nfrom typing import List, Dict, Tuple, Set, Optional\nfrom collections import deque\nimport warnings\nwarnings.filterwarnings('ignore')\n\n\n@dataclass\nclass State:\n   robot_pos: Tuple[int, int]\n   holding: Optional[str] = None\n   visited: Set[Tuple[int, int]] = field(default_factory=set)\n   objects_collected: Set[str] = field(default_factory=set)\n   def __hash__(self):\n       return hash((self.robot_pos, self.holding))\n\n\nclass SymbolicPlanner:\n   def __init__(self, grid_size: int = 8):\n       self.grid_size = grid_size\n       self.actions = ['up', 'down', 'left', 'right', 'pickup', 'drop']\n   def get_successors(self, state: State, obstacles: Set[Tuple[int, int]], objects: Dict[str, Tuple[int, int]]) -&gt; List[Tuple[str, State]]:\n       successors = []\n       x, y = state.robot_pos\n       moves = {'up': (x, y-1), 'down': (x, y+1), 'left': (x-1, y), 'right': (x+1, y)}\n       for action, new_pos in moves.items():\n           nx, ny = new_pos\n           if (0 &lt;= nx &lt; self.grid_size and 0 &lt;= ny &lt; self.grid_size and new_pos not in obstacles):\n               new_state = State(new_pos, state.holding, state.visited | {new_pos}, state.objects_collected.copy())\n               successors.append((action, new_state))\n       if state.holding is None:\n           for obj_name, obj_pos in objects.items():\n               if state.robot_pos == obj_pos and obj_name not in state.objects_collected:\n                   new_state = State(state.robot_pos, obj_name, state.visited.copy(), state.objects_collected.copy())\n                   successors.append(('pickup', new_state))\n       if state.holding is not None:\n           new_state = State(state.robot_pos, None, state.visited.copy(), state.objects_collected | {state.holding})\n           successors.append(('drop', new_state))\n       return successors\n   def heuristic(self, state: State, goal: Tuple[int, int]) -&gt; float:\n       return abs(state.robot_pos[0] - goal[0]) + abs(state.robot_pos[1] - goal[1])\n   def a_star_plan(self, start_state: State, goal: Tuple[int, int], obstacles: Set[Tuple[int, int]], objects: Dict[str, Tuple[int, int]]) -&gt; List[str]:\n       counter = 0\n       frontier = [(self.heuristic(start_state, goal), counter, 0, start_state, [])]\n       visited = set()\n       while frontier:\n           frontier.sort()\n           _, _, cost, state, plan = frontier.pop(0)\n           counter += 1\n           if state.robot_pos == goal and len(state.objects_collected) &gt;= len(objects):\n               return plan\n           state_key = (state.robot_pos, state.holding)\n           if state_key in visited:\n               continue\n           visited.add(state_key)\n           for action, next_state in self.get_successors(state, obstacles, objects):\n               new_cost = cost + 1\n               new_plan = plan + [action]\n               priority = new_cost + self.heuristic(next_state, goal)\n               frontier.append((priority, counter, new_cost, next_state, new_plan))\n               counter += 1\n       return []<\/code><\/pre>\n<\/div>\n<\/div>\n<p>We lay the foundation for our symbolic reasoning system and define how states, actions, and transitions work. We implement classical planning logic using A* search to generate goal-directed, interpretable action sequences. As we build this part, we establish the rule-based backbone that guides the agent\u2019s high-level decisions. Check out the\u00a0<strong><a href=\"https:\/\/github.com\/Marktechpost\/AI-Tutorial-Codes-Included\/blob\/main\/AI%20Agents%20Codes\/neuro_symbolic_hybrid_agent_Marktechpost.ipynb\" target=\"_blank\" rel=\"noreferrer noopener\">FULL CODES here<\/a><\/strong>.<\/p>\n<div class=\"dm-code-snippet dark dm-normal-version default no-background-mobile\">\n<div class=\"control-language\">\n<div class=\"dm-buttons\">\n<div class=\"dm-buttons-left\">\n<div class=\"dm-button-snippet red-button\"><\/div>\n<div class=\"dm-button-snippet orange-button\"><\/div>\n<div class=\"dm-button-snippet green-button\"><\/div>\n<\/div>\n<div class=\"dm-buttons-right\"><a><span class=\"dm-copy-text\">Copy Code<\/span><span class=\"dm-copy-confirmed\">Copied<\/span><span class=\"dm-error-message\">Use a different Browser<\/span><\/a><\/div>\n<\/div>\n<pre class=\"no-line-numbers\"><code class=\"no-wrap language-php\">class NeuralPerception:\n   def __init__(self, grid_size: int = 8):\n       self.grid_size = grid_size\n       self.W1 = np.random.randn(grid_size * grid_size, 64) * 0.1\n       self.b1 = np.zeros(64)\n       self.W2 = np.random.randn(64, 32) * 0.1\n       self.b2 = np.zeros(32)\n       self.W3 = np.random.randn(32, grid_size * grid_size) * 0.1\n       self.b3 = np.zeros(grid_size * grid_size)\n   def relu(self, x):\n       return np.maximum(0, x)\n   def sigmoid(self, x):\n       return 1 \/ (1 + np.exp(-np.clip(x, -500, 500)))\n   def perceive(self, noisy_grid: np.ndarray) -&gt; np.ndarray:\n       x = noisy_grid.flatten()\n       h1 = self.relu(x @ self.W1 + self.b1)\n       h2 = self.relu(h1 @ self.W2 + self.b2)\n       out = self.sigmoid(h2 @ self.W3 + self.b3)\n       return out.reshape(self.grid_size, self.grid_size)\n\n\nclass NeuralPolicy:\n   def __init__(self, state_dim: int = 4, action_dim: int = 4):\n       self.W = np.random.randn(state_dim, action_dim) * 0.1\n       self.b = np.zeros(action_dim)\n       self.action_map = ['up', 'down', 'left', 'right']\n   def softmax(self, x):\n       exp_x = np.exp(x - np.max(x))\n       return exp_x \/ exp_x.sum()\n   def get_action_probs(self, state_features: np.ndarray) -&gt; np.ndarray:\n       logits = state_features @ self.W + self.b\n       return self.softmax(logits)\n   def select_action(self, state_features: np.ndarray, symbolic_action: str) -&gt; str:\n       probs = self.get_action_probs(state_features)\n       if symbolic_action in self.action_map:\n           sym_idx = self.action_map.index(symbolic_action)\n           probs[sym_idx] += 0.7\n           probs = probs \/ probs.sum()\n       return np.random.choice(self.action_map, p=probs)<\/code><\/pre>\n<\/div>\n<\/div>\n<p>We introduce the neural components that allow our agent to sense and adapt. We design a lightweight neural network to denoise the environment and a simple policy network to refine actions based on features. As we integrate these elements, we ensure that our agent can handle uncertainty and adjust behavior dynamically. Check out the\u00a0<strong><a href=\"https:\/\/github.com\/Marktechpost\/AI-Tutorial-Codes-Included\/blob\/main\/AI%20Agents%20Codes\/neuro_symbolic_hybrid_agent_Marktechpost.ipynb\" target=\"_blank\" rel=\"noreferrer noopener\">FULL CODES here<\/a><\/strong>.<\/p>\n<div class=\"dm-code-snippet dark dm-normal-version default no-background-mobile\">\n<div class=\"control-language\">\n<div class=\"dm-buttons\">\n<div class=\"dm-buttons-left\">\n<div class=\"dm-button-snippet red-button\"><\/div>\n<div class=\"dm-button-snippet orange-button\"><\/div>\n<div class=\"dm-button-snippet green-button\"><\/div>\n<\/div>\n<div class=\"dm-buttons-right\"><a><span class=\"dm-copy-text\">Copy Code<\/span><span class=\"dm-copy-confirmed\">Copied<\/span><span class=\"dm-error-message\">Use a different Browser<\/span><\/a><\/div>\n<\/div>\n<pre class=\"no-line-numbers\"><code class=\"no-wrap language-php\">class NeuroSymbolicAgent:\n   def __init__(self, grid_size: int = 8):\n       self.grid_size = grid_size\n       self.planner = SymbolicPlanner(grid_size)\n       self.perception = NeuralPerception(grid_size)\n       self.policy = NeuralPolicy()\n       self.obstacles = {(3, 3), (3, 4), (4, 3), (5, 5), (6, 2)}\n       self.objects = {'key': (2, 6), 'gem': (6, 6)}\n       self.goal = (7, 7)\n   def create_noisy_observation(self, true_grid: np.ndarray) -&gt; np.ndarray:\n       noise = np.random.randn(*true_grid.shape) * 0.2\n       return np.clip(true_grid + noise, 0, 1)\n   def extract_state_features(self, pos: Tuple[int, int], goal: Tuple[int, int]) -&gt; np.ndarray:\n       return np.array([pos[0]\/self.grid_size, pos[1]\/self.grid_size, goal[0]\/self.grid_size, goal[1]\/self.grid_size])\n   def execute_mission(self, verbose: bool = True) -&gt; Tuple[List, List]:\n       start_state = State(robot_pos=(0, 0), visited={(0, 0)})\n       symbolic_plan = self.planner.a_star_plan(start_state, self.goal, self.obstacles, self.objects)\n       if verbose:\n           print(f\"<img decoding=\"async\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/16.0.1\/72x72\/1f9e0.png\" alt=\"\ud83e\udde0\" class=\"wp-smiley\" \/> Symbolic Plan Generated: {len(symbolic_plan)} steps\")\n           print(f\"   Plan: {symbolic_plan[:10]}{'...' if len(symbolic_plan) &gt; 10 else ''}n\")\n       true_grid = np.zeros((self.grid_size, self.grid_size))\n       for obs in self.obstacles:\n           true_grid[obs[1], obs[0]] = 1.0\n       noisy_obs = self.create_noisy_observation(true_grid)\n       perceived_grid = self.perception.perceive(noisy_obs)\n       if verbose:\n           print(f\"<img decoding=\"async\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/16.0.1\/72x72\/1f441.png\" alt=\"\ud83d\udc41\" class=\"wp-smiley\" \/>  Neural Perception: Denoised obstacle map\")\n           print(f\"   Perception accuracy: {np.mean((perceived_grid &gt; 0.5) == true_grid):.2%}n\")\n       trajectory = [(0, 0)]\n       current_pos = (0, 0)\n       actions_taken = []\n       for i, sym_action in enumerate(symbolic_plan[:30]):\n           features = self.extract_state_features(current_pos, self.goal)\n           refined_action = self.policy.select_action(features, sym_action) if sym_action in ['up','down','left','right'] else sym_action\n           actions_taken.append(refined_action)\n           if refined_action == 'up': current_pos = (current_pos[0], max(0, current_pos[1]-1))\n           elif refined_action == 'down': current_pos = (current_pos[0], min(self.grid_size-1, current_pos[1]+1))\n           elif refined_action == 'left': current_pos = (max(0, current_pos[0]-1), current_pos[1])\n           elif refined_action == 'right': current_pos = (min(self.grid_size-1, current_pos[0]+1), current_pos[1])\n           if current_pos not in self.obstacles:\n               trajectory.append(current_pos)\n       return trajectory, actions_taken<\/code><\/pre>\n<\/div>\n<\/div>\n<p>We bring the symbolic and neural layers together into a unified agent. We generate a symbolic plan, perceive the environment through neural processing, and refine each planned action using the neural policy. As we execute the mission loop, we observe how both systems interact seamlessly to produce robust behavior. Check out the\u00a0<strong><a href=\"https:\/\/github.com\/Marktechpost\/AI-Tutorial-Codes-Included\/blob\/main\/AI%20Agents%20Codes\/neuro_symbolic_hybrid_agent_Marktechpost.ipynb\" target=\"_blank\" rel=\"noreferrer noopener\">FULL CODES here<\/a><\/strong>.<\/p>\n<div class=\"dm-code-snippet dark dm-normal-version default no-background-mobile\">\n<div class=\"control-language\">\n<div class=\"dm-buttons\">\n<div class=\"dm-buttons-left\">\n<div class=\"dm-button-snippet red-button\"><\/div>\n<div class=\"dm-button-snippet orange-button\"><\/div>\n<div class=\"dm-button-snippet green-button\"><\/div>\n<\/div>\n<div class=\"dm-buttons-right\"><a><span class=\"dm-copy-text\">Copy Code<\/span><span class=\"dm-copy-confirmed\">Copied<\/span><span class=\"dm-error-message\">Use a different Browser<\/span><\/a><\/div>\n<\/div>\n<pre class=\"no-line-numbers\"><code class=\"no-wrap language-php\">def visualize_execution(agent: NeuroSymbolicAgent, trajectory: List, title: str = \"Neuro-Symbolic Agent Execution\"):\n   fig, axes = plt.subplots(1, 2, figsize=(14, 6))\n   ax = axes[0]\n   grid = np.zeros((agent.grid_size, agent.grid_size, 3))\n   for obs in agent.obstacles:\n       grid[obs[1], obs[0]] = [0.3, 0.3, 0.3]\n   for obj_pos in agent.objects.values():\n       grid[obj_pos[1], obj_pos[0]] = [1.0, 0.8, 0.0]\n   grid[agent.goal[1], agent.goal[0]] = [0.0, 1.0, 0.0]\n   for i, pos in enumerate(trajectory):\n       intensity = 0.3 + 0.7 * (i \/ len(trajectory))\n       grid[pos[1], pos[0]] = [intensity, 0.0, 1.0]\n   if trajectory:\n       grid[trajectory[0][1], trajectory[0][0]] = [1.0, 0.0, 0.0]\n   ax.imshow(grid)\n   ax.set_title(\"Agent Trajectory in Environment\", fontsize=14, fontweight='bold')\n   ax.set_xlabel(\"X Position\")\n   ax.set_ylabel(\"Y Position\")\n   ax.grid(True, alpha=0.3)\n   ax = axes[1]\n   ax.axis('off')\n   ax.text(0.5, 0.95, \"Neuro-Symbolic Architecture\", ha='center', fontsize=16, fontweight='bold', transform=ax.transAxes)\n   layers = [(\"SYMBOLIC LAYER\", 0.75, \"Planning \u2022 State Logic \u2022 Rules\"), (\"<img decoding=\"async\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/16.0.1\/72x72\/2195.png\" alt=\"\u2195\" class=\"wp-smiley\" \/> INTEGRATION\", 0.60, \"Feature Extraction \u2022 Action Blending\"), (\"NEURAL LAYER\", 0.45, \"Perception \u2022 Policy Learning\"), (\"<img decoding=\"async\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/16.0.1\/72x72\/2195.png\" alt=\"\u2195\" class=\"wp-smiley\" \/> EXECUTION\", 0.30, \"Action Refinement \u2022 Feedback\"), (\"ENVIRONMENT\", 0.15, \"State Transitions \u2022 Observations\")]\n   colors = ['#FF6B6B', '#4ECDC4', '#45B7D1', '#96CEB4', '#FFEAA7']\n   for i, (name, y, desc) in enumerate(layers):\n       ax.add_patch(plt.Rectangle((0.1, y-0.05), 0.8, 0.08, facecolor=colors[i], alpha=0.7, transform=ax.transAxes))\n       ax.text(0.5, y, f\"{name}n{desc}\", ha='center', va='center', fontsize=10, fontweight='bold', transform=ax.transAxes)\n   plt.tight_layout()\n   plt.savefig('neurosymbolic_agent.png', dpi=150, bbox_inches='tight')\n   plt.show()\n   print(f\"n<img decoding=\"async\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/16.0.1\/72x72\/2705.png\" alt=\"\u2705\" class=\"wp-smiley\" \/> Execution complete! Trajectory length: {len(trajectory)} steps\")<\/code><\/pre>\n<\/div>\n<\/div>\n<p>We visualize how the agent moves through the environment and how the architecture is structured. We plot obstacles, objects, the goal, and the full trajectory so that we can clearly see the agent\u2019s decision process. As we render the architecture layers, we understand how the hybrid design flows from planning to perception to action. Check out the\u00a0<strong><a href=\"https:\/\/github.com\/Marktechpost\/AI-Tutorial-Codes-Included\/blob\/main\/AI%20Agents%20Codes\/neuro_symbolic_hybrid_agent_Marktechpost.ipynb\" target=\"_blank\" rel=\"noreferrer noopener\">FULL CODES here<\/a><\/strong>.<\/p>\n<div class=\"dm-code-snippet dark dm-normal-version default no-background-mobile\">\n<div class=\"control-language\">\n<div class=\"dm-buttons\">\n<div class=\"dm-buttons-left\">\n<div class=\"dm-button-snippet red-button\"><\/div>\n<div class=\"dm-button-snippet orange-button\"><\/div>\n<div class=\"dm-button-snippet green-button\"><\/div>\n<\/div>\n<div class=\"dm-buttons-right\"><a><span class=\"dm-copy-text\">Copy Code<\/span><span class=\"dm-copy-confirmed\">Copied<\/span><span class=\"dm-error-message\">Use a different Browser<\/span><\/a><\/div>\n<\/div>\n<pre class=\"no-line-numbers\"><code class=\"no-wrap language-php\">if __name__ == \"__main__\":\n   print(\"=\" * 70)\n   print(\"NEURO-SYMBOLIC HYBRID AGENT TUTORIAL\")\n   print(\"Combining Classical AI Planning with Modern Neural Networks\")\n   print(\"=\" * 70)\n   print()\n   agent = NeuroSymbolicAgent(grid_size=8)\n   trajectory, actions = agent.execute_mission(verbose=True)\n   visualize_execution(agent, trajectory)\n   print(\"n\" + \"=\" * 70)\n   print(\"KEY INSIGHTS:\")\n   print(\"=\" * 70)\n   print(\"\u2726 Symbolic Layer: Provides interpretable, verifiable plans\")\n   print(\"\u2726 Neural Layer: Handles noisy perception &amp; adapts to uncertainty\")\n   print(\"\u2726 Integration: Combines strengths of both paradigms\")\n   print(\"\u2726 Benefits: Explainability + Flexibility + Robustness\")\n   print(\"=\" * 70)<\/code><\/pre>\n<\/div>\n<\/div>\n<p>We run the complete neuro-symbolic pipeline from planning to execution to visualization. We instantiate the agent, execute the mission, and display key insights to summarize the system\u2019s behavior. As we run this final block, we see the overall hybrid architecture in action and appreciate how each component contributes to the outcome.<\/p>\n<p>In conclusion, we observe how smoothly the symbolic and neural components work together to produce a more capable and reliable agent. We appreciate how the symbolic planner gives us transparent, verifiable steps, while the neural layer adds adaptability and perceptual grounding that pure logic cannot offer. Through this hybrid approach, we can build agents that reason, perceive, and act in ways that are both intelligent and interpretable. We end with a deeper understanding of how neuro-symbolic AI moves us closer to practical, resilient agentic systems.<\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n<p>Check out the\u00a0<strong><a href=\"https:\/\/github.com\/Marktechpost\/AI-Tutorial-Codes-Included\/blob\/main\/AI%20Agents%20Codes\/neuro_symbolic_hybrid_agent_Marktechpost.ipynb\" target=\"_blank\" rel=\"noreferrer noopener\">FULL CODES here<\/a><\/strong>.\u00a0Feel free to check out our\u00a0<strong><mark><a href=\"https:\/\/github.com\/Marktechpost\/AI-Tutorial-Codes-Included\" target=\"_blank\" rel=\"noreferrer noopener\">GitHub Page for Tutorials, Codes and Notebooks<\/a><\/mark><\/strong>.\u00a0Also,\u00a0feel free to follow us on\u00a0<strong><a href=\"https:\/\/x.com\/intent\/follow?screen_name=marktechpost\" target=\"_blank\" rel=\"noreferrer noopener\"><mark>Twitter<\/mark><\/a><\/strong>\u00a0and don\u2019t forget to join our\u00a0<strong><a href=\"https:\/\/www.reddit.com\/r\/machinelearningnews\/\" target=\"_blank\" rel=\"noreferrer noopener\">100k+ ML SubReddit<\/a><\/strong>\u00a0and Subscribe to\u00a0<strong><a href=\"https:\/\/www.aidevsignals.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">our Newsletter<\/a><\/strong>. Wait! are you on telegram?\u00a0<strong><a href=\"https:\/\/t.me\/machinelearningresearchnews\" target=\"_blank\" rel=\"noreferrer noopener\">now you can join us on telegram as well.<\/a><\/strong><\/p>\n<p>The post <a href=\"https:\/\/www.marktechpost.com\/2025\/11\/24\/how-to-build-a-neuro-symbolic-hybrid-agent-that-combines-logical-planning-with-neural-perception-for-robust-autonomous-decision-making\/\">How to Build a Neuro-Symbolic Hybrid Agent that Combines Logical Planning with Neural Perception for Robust Autonomous Decision-Making<\/a> appeared first on <a href=\"https:\/\/www.marktechpost.com\/\">MarkTechPost<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>In this tutorial, we demonstrate how to combine the strengths of symbolic reasoning with neural learning to build a powerful hybrid agent. We focus on creating a neuro-symbolic architecture that uses classical planning for structure, rules, and goal-directed behavior, while neural networks handle perception and action refinement. As we walk through the code, we see how both layers interact in real time, allowing us to navigate an environment, overcome uncertainty, and adapt intelligently. At last, we understand how neuro-symbolic systems bring interpretability, robustness, and flexibility together in a single agentic framework. Check out the\u00a0FULL CODES here. Copy CodeCopiedUse a different Browser import numpy as np import matplotlib.pyplot as plt from dataclasses import dataclass, field from typing import List, Dict, Tuple, Set, Optional from collections import deque import warnings warnings.filterwarnings(&#8216;ignore&#8217;) @dataclass class State: robot_pos: Tuple[int, int] holding: Optional[str] = None visited: Set[Tuple[int, int]] = field(default_factory=set) objects_collected: Set[str] = field(default_factory=set) def __hash__(self): return hash((self.robot_pos, self.holding)) class SymbolicPlanner: def __init__(self, grid_size: int = 8): self.grid_size = grid_size self.actions = [&#8216;up&#8217;, &#8216;down&#8217;, &#8216;left&#8217;, &#8216;right&#8217;, &#8216;pickup&#8217;, &#8216;drop&#8217;] def get_successors(self, state: State, obstacles: Set[Tuple[int, int]], objects: Dict[str, Tuple[int, int]]) -&gt; List[Tuple[str, State]]: successors = [] x, y = state.robot_pos moves = {&#8216;up&#8217;: (x, y-1), &#8216;down&#8217;: (x, y+1), &#8216;left&#8217;: (x-1, y), &#8216;right&#8217;: (x+1, y)} for action, new_pos in moves.items(): nx, ny = new_pos if (0 &lt;= nx &lt; self.grid_size and 0 &lt;= ny &lt; self.grid_size and new_pos not in obstacles): new_state = State(new_pos, state.holding, state.visited | {new_pos}, state.objects_collected.copy()) successors.append((action, new_state)) if state.holding is None: for obj_name, obj_pos in objects.items(): if state.robot_pos == obj_pos and obj_name not in state.objects_collected: new_state = State(state.robot_pos, obj_name, state.visited.copy(), state.objects_collected.copy()) successors.append((&#8216;pickup&#8217;, new_state)) if state.holding is not None: new_state = State(state.robot_pos, None, state.visited.copy(), state.objects_collected | {state.holding}) successors.append((&#8216;drop&#8217;, new_state)) return successors def heuristic(self, state: State, goal: Tuple[int, int]) -&gt; float: return abs(state.robot_pos[0] &#8211; goal[0]) + abs(state.robot_pos[1] &#8211; goal[1]) def a_star_plan(self, start_state: State, goal: Tuple[int, int], obstacles: Set[Tuple[int, int]], objects: Dict[str, Tuple[int, int]]) -&gt; List[str]: counter = 0 frontier = [(self.heuristic(start_state, goal), counter, 0, start_state, [])] visited = set() while frontier: frontier.sort() _, _, cost, state, plan = frontier.pop(0) counter += 1 if state.robot_pos == goal and len(state.objects_collected) &gt;= len(objects): return plan state_key = (state.robot_pos, state.holding) if state_key in visited: continue visited.add(state_key) for action, next_state in self.get_successors(state, obstacles, objects): new_cost = cost + 1 new_plan = plan + [action] priority = new_cost + self.heuristic(next_state, goal) frontier.append((priority, counter, new_cost, next_state, new_plan)) counter += 1 return [] We lay the foundation for our symbolic reasoning system and define how states, actions, and transitions work. We implement classical planning logic using A* search to generate goal-directed, interpretable action sequences. As we build this part, we establish the rule-based backbone that guides the agent\u2019s high-level decisions. Check out the\u00a0FULL CODES here. Copy CodeCopiedUse a different Browser class NeuralPerception: def __init__(self, grid_size: int = 8): self.grid_size = grid_size self.W1 = np.random.randn(grid_size * grid_size, 64) * 0.1 self.b1 = np.zeros(64) self.W2 = np.random.randn(64, 32) * 0.1 self.b2 = np.zeros(32) self.W3 = np.random.randn(32, grid_size * grid_size) * 0.1 self.b3 = np.zeros(grid_size * grid_size) def relu(self, x): return np.maximum(0, x) def sigmoid(self, x): return 1 \/ (1 + np.exp(-np.clip(x, -500, 500))) def perceive(self, noisy_grid: np.ndarray) -&gt; np.ndarray: x = noisy_grid.flatten() h1 = self.relu(x @ self.W1 + self.b1) h2 = self.relu(h1 @ self.W2 + self.b2) out = self.sigmoid(h2 @ self.W3 + self.b3) return out.reshape(self.grid_size, self.grid_size) class NeuralPolicy: def __init__(self, state_dim: int = 4, action_dim: int = 4): self.W = np.random.randn(state_dim, action_dim) * 0.1 self.b = np.zeros(action_dim) self.action_map = [&#8216;up&#8217;, &#8216;down&#8217;, &#8216;left&#8217;, &#8216;right&#8217;] def softmax(self, x): exp_x = np.exp(x &#8211; np.max(x)) return exp_x \/ exp_x.sum() def get_action_probs(self, state_features: np.ndarray) -&gt; np.ndarray: logits = state_features @ self.W + self.b return self.softmax(logits) def select_action(self, state_features: np.ndarray, symbolic_action: str) -&gt; str: probs = self.get_action_probs(state_features) if symbolic_action in self.action_map: sym_idx = self.action_map.index(symbolic_action) probs[sym_idx] += 0.7 probs = probs \/ probs.sum() return np.random.choice(self.action_map, p=probs) We introduce the neural components that allow our agent to sense and adapt. We design a lightweight neural network to denoise the environment and a simple policy network to refine actions based on features. As we integrate these elements, we ensure that our agent can handle uncertainty and adjust behavior dynamically. Check out the\u00a0FULL CODES here. Copy CodeCopiedUse a different Browser class NeuroSymbolicAgent: def __init__(self, grid_size: int = 8): self.grid_size = grid_size self.planner = SymbolicPlanner(grid_size) self.perception = NeuralPerception(grid_size) self.policy = NeuralPolicy() self.obstacles = {(3, 3), (3, 4), (4, 3), (5, 5), (6, 2)} self.objects = {&#8216;key&#8217;: (2, 6), &#8216;gem&#8217;: (6, 6)} self.goal = (7, 7) def create_noisy_observation(self, true_grid: np.ndarray) -&gt; np.ndarray: noise = np.random.randn(*true_grid.shape) * 0.2 return np.clip(true_grid + noise, 0, 1) def extract_state_features(self, pos: Tuple[int, int], goal: Tuple[int, int]) -&gt; np.ndarray: return np.array([pos[0]\/self.grid_size, pos[1]\/self.grid_size, goal[0]\/self.grid_size, goal[1]\/self.grid_size]) def execute_mission(self, verbose: bool = True) -&gt; Tuple[List, List]: start_state = State(robot_pos=(0, 0), visited={(0, 0)}) symbolic_plan = self.planner.a_star_plan(start_state, self.goal, self.obstacles, self.objects) if verbose: print(f&#8221; Symbolic Plan Generated: {len(symbolic_plan)} steps&#8221;) print(f&#8221; Plan: {symbolic_plan[:10]}{&#8216;&#8230;&#8217; if len(symbolic_plan) &gt; 10 else &#8221;}n&#8221;) true_grid = np.zeros((self.grid_size, self.grid_size)) for obs in self.obstacles: true_grid[obs[1], obs[0]] = 1.0 noisy_obs = self.create_noisy_observation(true_grid) perceived_grid = self.perception.perceive(noisy_obs) if verbose: print(f&#8221; Neural Perception: Denoised obstacle map&#8221;) print(f&#8221; Perception accuracy: {np.mean((perceived_grid &gt; 0.5) == true_grid):.2%}n&#8221;) trajectory = [(0, 0)] current_pos = (0, 0) actions_taken = [] for i, sym_action in enumerate(symbolic_plan[:30]): features = self.extract_state_features(current_pos, self.goal) refined_action = self.policy.select_action(features, sym_action) if sym_action in [&#8216;up&#8217;,&#8217;down&#8217;,&#8217;left&#8217;,&#8217;right&#8217;] else sym_action actions_taken.append(refined_action) if refined_action == &#8216;up&#8217;: current_pos = (current_pos[0], max(0, current_pos[1]-1)) elif refined_action == &#8216;down&#8217;: current_pos = (current_pos[0], min(self.grid_size-1, current_pos[1]+1)) elif refined_action == &#8216;left&#8217;: current_pos = (max(0, current_pos[0]-1), current_pos[1]) elif refined_action == &#8216;right&#8217;: current_pos = (min(self.grid_size-1, current_pos[0]+1), current_pos[1]) if current_pos not in self.obstacles: trajectory.append(current_pos) return trajectory, actions_taken We bring the symbolic and neural layers together into a unified agent. We generate a symbolic plan, perceive the environment through neural processing, and refine each planned action using the neural policy. As we execute the mission loop, we observe how both systems interact seamlessly to produce robust behavior. Check out the\u00a0FULL CODES here. Copy CodeCopiedUse a different Browser def visualize_execution(agent: NeuroSymbolicAgent, trajectory: List, title: str = &#8220;Neuro-Symbolic Agent Execution&#8221;): fig, axes = plt.subplots(1, 2, figsize=(14, 6)) ax = axes[0] grid<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"pmpro_default_level":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_pvb_checkbox_block_on_post":false,"footnotes":""},"categories":[52,5,7,1],"tags":[],"class_list":["post-53456","post","type-post","status-publish","format-standard","hentry","category-ai-club","category-committee","category-news","category-uncategorized","pmpro-has-access"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3 - 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